摘要
利用物质点法,在边坡滑动面处设立接触法则,提出且实现仅折减滑动面强度的局部强度折减法,用于边坡稳定性评价,并与一般强度折减法和极限平衡法进行对比。研究结果表明:局部强度折减法的边坡失稳判据明确,安全系数计算值、滑动面位置与极限平衡法的结果一致;与一般强度折减法折减边坡整体土体强度的做法相比,局部强度折减法仅折减滑动面强度,符合滑坡失稳机理;物质点局部强度折减法可用于边坡稳定性评价和边坡破坏后果评价。
By using the material point method, the contact law is set up in the slope sliding surface,local strength reduction method with only reduction sliding surface strength is proposed and realized, and the local strength reduction method is used for slope stability evaluation.Comparing with limit equilibrium method and general strength reduction method, the conclusions can be derived as follows：The slope failure evaluation criterion of local strength reduction method is clear. The results of safety factor value and sliding surface position from local strength reduction method are basically the same with limit equilibrium method. Comparing with strength reduction method which reduces whole slope＇s soil strength, the local strength reduction method with only reduction sliding surface strength, is confronted to the slope failure mechanism. Local strength reduction method can be used for the evaluation of the slope stability and the evaluation of slope failure consequence.
出处
《交通科学与工程》
2016年第4期1-9,共9页
Journal of Transport Science and Engineering
基金
中国中冶"三五"重大科技专项
关键词
局部强度折减法
物质点法
边坡稳定性评价
安全系数
local strength reduction method
material point method
slope stability evaluation
safety factor
